Venetian blinds come in a variety of materials, such as aluminium, wood, faux wood and vinyl. Depending on the material---wood, for instance---the blinds can be expensive. Over time, even expensive blinds can wear down and strings can break. You can save money in the long run if you replace the string yourself rather than purchasing new blinds. It just takes a few basic materials to restring your Venetian blinds. These instructions work for any horizontal blinds that use slats and a ladder system.
Take the blinds down from the metal brackets on the wall by lifting them out. Use a flat screwdriver to pry them from the brackets if they are not easy to get out.
Set the blinds on a flat surface. Undo the knot in the string underneath the bottom rail, or snip the string with scissors. Pull the string from all of the holes in the slats.
Lay the old string beside the new one and use it as a template to cut the new one to the correct length.
Thread the new string through the hole in the cord lock located in the head rail and pull the string through the head rail. Feed the string through the openings in the slats.
Pull the cord through the spot in the bottom rail and tie a double knot in the end of the string just under the bottom rail. Trim the extra string off with scissors.
Hook the blinds on the wall and check the length. Make adjustments if the blinds do not hang correctly.
Limit wear and tear on the blinds by avoiding lifting and lowering the blinds while they are open. Consult the manufacturer to determine what size string to use for your particular blind.
Do not raise and lower the blinds to the blinds to the same spot every time. This will cause the string to weaken.